研究一类控制多边形下C-Bézier曲线的形状,根据控制多边形的边长情况分别给出了其对应的C-Bézier曲线含有尖点、重点以及两个拐点的充分必要条件.
The shapes of cubic C-Bézier curves lying to a class of control polygons are studied.The necessary and sufficient conditions of cups,loops and inflection points are given according to the side length of the control polygons respectively.